The recommended level of humidity for a home is between 40 percent and 50 percent in warm weather. In wintertime, a humidity level of between 30 percent and 40 percent is recommended.
If the humidity is over 50 percent in a home, it causes mold and mildew issues in the home, warped wood, and peeling paint and wallpaper. It also causes discomfort and health problems, such as allergy issues. The humidity level in a home is easily lowered with the use of a dehumidifier. If the humidity level is too low in a home, it causes dry skin and excessive static electricity. Humidifiers are effective at raising the humidity level in a home.